Troubleshooting

RENR2696-01 47
Troubleshooting Section
•
91-08 Throttle Position Sensor Abnormal
•
774-08 Sec Throttle Position Signal Abnormal
•
41-03 8 Volt Sen
sor Power Supply Voltage more
than normal
•
41-04 8 Volt Se
nsor Power Supply Volltage less
than normal
Refer to Troub
leshooting, “Engine Speed/T iming
Sensor Circuit - Test” if any of the following diagnostic
codes are active.
•
320-02 Speed/Timing Sensor intermittent loss of
signal
•
320-11 Speed/Timing Sensor loss of signal
If there are no
active diagnostic codes refer to the
Troubleshooting Manual for your machine application.
i01798124
Engine Stalls at Low RPM
Probable Causes
•
Refer to logged codes.
•
Faulty fuel injection nozzles
•
Fuel supply
•
Accessory equipment
•
Power mode control (if equipped)
Recommended Actions
Diagnostic Codes
Check for active diagnostic codes on the Electronic
Service Tool. Troubleshoot any active codes before
continuing with this procedure.
Fuel Injection Nozzles
1. Check for correct installation of fuel injection
nozzles. Refer to Disassembly and Assembly,
“Fuel Injection Nozzle - Install”.
2. Check for proper operation of the fuel injection
nozzle. Refer to Systems Operation, Testing and
Adjusting, “Fuel Injection Nozzle - Test”.
Fuel Supply
1. Check the fuel pressure. Refer to Systems
Operation, Testing and Adjusting, “Fuel System
Pressure - Tes
t”.
2. Ensure that the fuel system has been primed.
Refer to Syste
ms Operation, Testing and
Adjusting, “Fuel System - Prime”.
3. Check the dies
el fuel for contamination. Refer to
Systems Operation, Testing and Adjusting, “Fuel
Quality - Test”.
4. Check for air in the fuel system. Refer to Systems
Operation, Testing and Adjusting, “Air in Fuel -
Te s t ” .
5. Check that the fuel lines are tight and secured
properly.
6. Check for fuel supply lines that are restricted.
7. Check the fuel filters.
8. Visually ch
eck the fuel tank for fuel. The fuel
gauge may be faulty.
9. If the engin
e has a water separator, check for
water in the fuel.
10. Ensure that
the fuel supply valve (if equipped) is
in the full OPEN position.
11. If the tempe
rature is below 0 °C (32 °F), check
for solidified fuel (wax).
NOTICE
Do not crank
the engine continuously for more than
30 seconds. Allow the starting motor to cool for two
minutes before cranking the engine again.
Accessory Equipment
Check all a
ccessory equipment for problems that
may create excessive load on the engine. Repair
any damaged components or replace any damaged
component
s.
Power Mode Control (If Equipped)
1. Check the Data Link. Refer to Troubleshooting, “
Data Link Circuit - Test”.
2. Check the engine wiring harness for defects.
Refer to Troubleshooting, “Electricial Connectors
- Inspect
”.
3. If there are no active diagnostic codes refer to
the Troub
leshooting Manual for your engine
application.